George c



(No Model.)

G. G. DEAYKE 8u G. N. MOORE.

SUBWAY JUNCTION BOX.

No. 579,864. Patented Mar. 30, 1897.

nizza),

Ofic

WITNESSES:

` ATTORNEYS.

GEORGE C. DEAKE AND GEORGE N. MOORE, OE NEV YORK, N. Y.

suBwAY JUNCTION-Box.

SPECIFICATION forming part of Letters Patent No. 579,864, dated March30, 1897.

Application filed J' une 30, 1896.

To all whom it may concern,.-

Be it known that we, GEORGE C. DEAKE and GEORGE N. MOORE, citizens ofthe United States, and residents of New York city, in the county andState of New York, have invented certain new and useful Improvements inSubway Junction-Boxes, of which the following is a speciiication.

Our invention consists of improvements in subway junction-boxes wherebythe accumulations of gas in the subways may be effectually vented offwithout liability of derangement by water and frost in cold weather andso as to insure certainty of relief at all times from the dangerousexplosions now common to subways, as hereinafter described, referencebeing made to the accompanying drawings, in which- Figure l is asectional elevation of a subway-box and parts of subway-tubes,illustrating the application of our invention.' Fig. 2 is a sectionalelevation of the duplex` reliefvalve of our improved apparatus on anenlarged scale. Fig. 3 is a transverse section of Fig. 2 on line 2 2,and Fig. 4 is a similar section on line 4 4.

A represents the subway-box; h, the tubes of the subway, connected withthe box.

cis the cover-plate, bolted down and tightly packed on, the flange dbelow the top of the box to exclude water, and-c is the cover at the topof the box flush with the surface, as commonly arranged, said cover enot being bolted because of the impracticability of maintaining a tightcover at the surface exposed to the roadway traffic.

In a valve-case f, properly inserted in the cover c, we provide arelief-valve g, with a regulating-spring h, coiled on the stem andsubject to a tubular adjusting-nut vl for adjustin g the pressure of thespring on the valve, as desired. The nut i is iitted in the perforatedand screw-threaded diaphragm k, and is of tubular construction to permitthe valvestem Z to extend through and above it for the application'ofanother valve m to its upper end, and which seats on the top of the casef in an arrangement adapted to shed off any water that may fall on thetop, as of vapor that may condense on the under side of the cover, or incase the chamber should ll with water leaking through the joint of thetop Serial No. 597,657. (No model.)

cover and thus protect the gas-valve from wa# ter and exclude it fromthe valve-case, which being iilled or partly lled would burst bythefreezing of the water in cold weather.

We couple the upper valve with the stem Zby a sliding joint, as n,whereby the gas- Valve will rise first and the chamber between the twovalves will fill with gas of sufficient tension to blow olii' any waterthat may happen to be in such relation to valve m as would otherwiseowon the opening of valve m into the case and might carry dirt onto theseat and prevent effective closing.

Our invention relieves the subway service of a large expense in openingboxes at intervals along the lines daily to permit escape of gas, whichis the common practice and involves the services of considerable numbersof men in large systems.

We claiml. The combination in a subway-box, of the inner lowerwater-tight cover, the loose top cover, and the duplex gas-relief valvein the lower cover, said valve adapted to first open the vent into thevalve-chamber, and later open the vent from said chamber substantiallyas described.

2. The combination in a subway-box, of the inner lower water-tightcover, the loose top cover, and the duplex gas-relief valve in the lowercover, one of the valve-disks being connected to the valve-stem byasliding joint to delay its opening relatively to the opening of theother disk substantially as described.

3. The combination ina subway-box, of the inner lower water-tight cover,the loose top cover, and the duplex gas-relief valve in the lower cover,the lower disk of said valve being permanently xed to the stem, and theupper valve-disk connected to said stem by a sliding joint to delay itsaction relatively to the action of the lower disk substantially asdescribed.

4. The combinationin a subway-box, of the inner lower water-tight cover,the loose top cover, and the duplex gas-relief valve in the lower cover,the upper disk of the valve being seated at the top of the valve-casefor dis* charge of the water thereon by the escaping gas substantiallyas described.

5. The combination in a subway-box, of the inner lower water-tightcover, the loose top IOO cover and the duplex gosre1ief valve in theSigned at New York eity,i11 the county and lowel` cover, the upper diskof the Valve be- State of New York, this 11th day of June, A. Io ingsented at the top of the valve-ease for ds- D. 1800.

charge of the Water thereon by the escaping GEO. O. DEAKE.

gas, and connected to the valve-stem by a GEORGE N. MOORE. sliding jointfor opennglater than the open- XVtnesses:

ing of the lower valve substantially as de- XV. J. MORGAN,

scribed. A. P. THAYER.

